ibm3206k0424 ETC-unknow, ibm3206k0424 Datasheet - Page 333

• Manufacturer Part Number: ibm3206k0424
• Description: Ibm Processor For Network Resources
• Manufacturer: ETC-unknow

Preliminary
RXBUF Block Diagram
RXBUF Functional Description
RXBUF provides the cell/packet buffering mechanism between LINKR and the rest of REASM. The buffering
provides enough storage for 16 64-byte cells and the associated control information for each cell buffer.
LINKR writes the cell/packet data and control information into the buffers. The buffering mechanism is then
exposed to the remainder of the REASM sub-entities for reading.
The cell buffers are sequenced through in sequential order regardless of which port received cells arrive on.
Thus, a total of 16 cells of buffering exists and is used as a shared 16-cell FIFO.
12.7: RXBUF Cell Data Buffer Address
Provides the read/write address for accessing cell data buffer. This register provides the read/write address
for accessing cell data buffer. When RXBUF Cell Data Buffer Read/Write Port is read/written, this register is
auto-incremented. When the last address is read/written, the address rolls over to zero.
Length
Type
Address
Power On Value
Restrictions
pnr25.chapt05.01
August 14, 2000
RXBUF
Asynchronous Boundary with LINKR
Read Interface to RXXLT
sop
eop
err
portId(4-0)
cfgId(1-0)
cellLen(6-0)
addr(6-3)
16 Entry
Cell Info
11 bits
Read/Write
XXXX 1640
X’00000000’
Low two bits are always zero
wrtic
Read Interface to Sub-Entities
16 64-byte Cell Buffers
clps
addr(6-0)
data963-0)
wrtc
IBM Processor for Network Resources
Cell/Packet Re-assembly (REASM)
clst(16-0)
ovrs
rest
clst(16-0)
ovrs
Done
Page 333 of 676
IBM3206K0424